APA-Zitierstil (7. Ausg.)

Heide, L. (2009). Punched-card systems and the early information explosion, 1880 - 1945. Hopkins Univ. Press.

Chicago-Zitierstil (17. Ausg.)

Heide, Lars. Punched-card Systems and the Early Information Explosion, 1880 - 1945. Baltimore: Hopkins Univ. Press, 2009.

MLA-Zitierstil (9. Ausg.)

Heide, Lars. Punched-card Systems and the Early Information Explosion, 1880 - 1945. Hopkins Univ. Press, 2009.